A woman has vanished while digging a dinosaur bone bed in the remote Canadian wilderness, and somehow, the only evidence has found its way to Kay Scarpetta, over two thousand miles away in Boston, and she has no idea why. Events begin to unfold at amazing speed and Scarpetta begins to suspect the disappearance may be connected to a series of crimes much closer to home: a gruesome murder, inexplicable tortures and trace evidence from the dinosaur age. Scarpetta also finds that danger and suspicion have penetrated even her closest circles. her niece Lucy speaks in riddles. Her lead investigator Pete Marino and FBI husband Benton have secrets. Scarpetta feels alone as she tracks a cunning, cruel killer.